<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <button onclick="jump()">跳转到百度</button>
    <button id="btn">返回</button>
    <script>
      function jump() {
        location.href = 'http://baidu.com';
      }
      document.getElementById('btn').onclick = function(event){
            event.history.back(-1)
      }
      
    </script>
  </body>
</html>
